material selection case study felt reusable surface insulation (frsi) of space shuttle orbiter
DESCRIPTION
Gives the detailed case study , in selection of materials . Referance michael f. ashby material selection for mechanical designTRANSCRIPT
MATERIAL SELECTION CASE STUDY
FELT REUSABLE SURFACE
INSULATION (FRSI)
OF SPACE SHUTTLE ORBITER
P R E S E N T E D B Y
B A G G I O J O S E
R O L L N O : 1 3 M D 0 1
CONTENTS
1. DESCRIPTION
2. TRANSLATION
3. FORMULATION
4. SELECTION
5. SUPPORTING INFORMATION
6. COMMENTS
DESCRIPTION
• SPACE SHUTTLE ORBITER carries rocket
• It is reusable
• Subjected to high temperature(400 c)
• Subjected vibration (high speed motion)
• Aerodynamically smooth surface
• Low density
• Thermal fatigue
SPACE SHUTTLE ORBITER
TRANSLATION
FUNCTION == Thermal protection for
space shuttle orbiter
CONSTRAINTS == service temperature
stiffness
surface roughness
OBJECTIVES == minimum weight
low thermal expansion
durability
FREE VARIABLES == material
cost
FORMULATION
MATERIAL INDICES
1. Service temperature (>400)
2. High stiffness
M2 = E1/2 / ρ
3. Thermal expansion coefficient
M3= α / E
4. Fracture toughness
M4 = σf / ρ
SELECTION
CONTD…
CONTD…
CONTD…
RANKING
1. Nylon
2. Silicone rubber
3. Ceramics
SUPPORTING INFORMATION
• Nylon material coated with silicone elastomer
• Bonded to aluminum sheets by RTV silicone adhesives
• Thickness of blanket – 4 & 8 mm
COMMENTS
• Ceramic tiles are used when temperature variation is
more .
• Quartz , borosilicate glass are other options
• Composites with low density silica fibers are the new
materials